Mortise knob lock



April 2, 1929'. F. E. BEST ET AL MORTISE KNOB LOCK Original Filed Feb. ll, 1925 2 Sheets-Sheet April 2, 1929. |r- E, BEST ET AL 1,707,215

MORTI SE KNOB LOCK original Filed Feb. 11, 1925 2 sheets-sheet 2 54 .Il-g... 4- fzg- G3 Gl .lll-uml @E i l O Patented Apr. 2, 1929.

UNITED STATES FRANK ELLISON BEST AND FBEDERICKPOWELL, F

siemens To FRANK n. nner, Tivo., or WASHINGTON.

SEATTLE, WASHINGTONL AS- SEATTLE, WASHINGTON, A CORPDRATION OF MORTISE KNOB LOCK.

Application filed. February 11, 1925, Serial No. 8,493. Renewed August 28, 1928.

Uur invention relates to improvements in mortise knob locks and is in the nature ot' an improvement on the knob lock shown and described in our prior application Serial Nunn ber 733,810 tiled August 23, 1924.

The objects ot this in'lprovement are `to provide a knob lock of this nature having` in combination a dead bolt arranged to be mannally operated. trom either side of the door and having' means connected with and operated` in connect-ion with the accompanying\draw-` me's.

ln the drawings Figure 1 is a view with the cover `plato removed ot a lock constructed in accordance with this invention.

Fin. 2 is an edge view showing the `liront plate of the lock.

lllig. 3 is a sectional view substantially on l brok-en line 3?5 otFig. 1 parts being shown in plan. i

Fig. l; is a sectional view substantially on broken line 1 fl of Fig. 1, parts being shown in plan. y i y lli 5 is a view partly in section and partly in elevation substantially on broken line 5-5 of Fig. 1. y i i Fig. 6 is an isometric view showing a dea-d bolt and a catch member therefor.

liig. 7 is a similar isometric view showing dead bolt throw mechanism and certain devices lor locking the knob spindles and the dead bolt throw means.

i a latch bolt 17 that is urged outwardly by a spring 18. The inner end of the latch bolt 17 is slidab-ly connected with a stirrup member 20 through which the knob Shanks 15 and 16 extend.. said stirrnp 2O being1 arranged to be engaged and retracted by sleeves 21 and 22011 `the endwise movement of spindle the spindles 15 and 16 that arey turned by rotation ot the knobs. It an attempt is made to pick the lock by inserting a thin instrument between the door and the jamb and forcing the latch bolt back b-y pressure on the inclined surface of said latch bolt the shank of the latch bolt will slide rearwardly through stirrup 2O without movine said stirrup.

A pin tumbler lock 23 is provided in the outer knob shank 13 and is connected by suitable throw mechanism 24 with a rotatably supported locking spindle 25 having on one end a cam 26 that engages with a corresponding cam 27 on a longitudinally movable locking spindle 28 so that when the spindle 25 is turned the spindle 28 will be moved endwise,

28 controlling-.the locking,- and unlocking of the bolts as hereinafter described. Spindle entends into inner knob shank 12 and terminates in a head 3() that engages with a rigid cross member 31 on a push button 32. Another push button 33 is provided in knob shank 12 and is connected with push button 32 by a small beam 311; that is pivot-ed at 35 and` is arranged so that when one push button is pressed inwardly the other' push button will snap out. A spring 36 urges spindle 218 outwardly and is arranged to compress whenv the spindle 28 is moved inwardly by depressingpnsh button 33. Springs 37 term yielding' detent means for holding;1 the push buttons at the limit of their movement in either' direction.`

All of the above mentioned parts are sub stantially vthe same as those described in our preceding application hereinbefore referred to. i

Our present invention consists in the pro-l vision in connection with this lock of a manually operated dead bolt and 1n the intcrcon neetion of said dead bolt with the latch bolt mechanism in such a manner that the dead bolt cannot be thrown. unless the latch bolt is in a locked position and that after the dead bolt is thrown it can only be retracted by the turninnr of the knobs alter` the same are unlocked.

For the purpose of locking the spindle 28 against rotary movement we provide a dog,` 38 that is rigid with said spindle and extends` outwardly through slots 1 0 in sleeves 15 and 16 and has, in its end a recess 41 for the reception of a toothllQ on a locking member l-3` that is secured by pivot lll to the `sleeve 22 which sleeve is connected with the outer lits inward' movement.

The locking member 43is provided with a pawl 45 arranged to enter and lock within a slot 46 in a latch housing 47 that is mortised intosthe door 48 on vwhich the device is installed to thereby lock the sleeve 2Q and outer knob 13 against. turning. Endwise movement of spindle 28 will turn locking member 43 on its pivot thereby moving pawl 45 from locked-to nnlocked'position and vice vversa in I anpbvious manner.

Disposed within ai@ iai-eh teasing 47 below the nach bon y17 is eased non 5e guided .n

its outer end in a plate, 51 'and having' a slot 52m its inner end that fits over' a transverse' bolt operating' me`1nbe`r53 that is provided, on both the inner and outer sides of the door with thumb turns 54 by which it may be turned. A stop member 55 on bolt operating member' engages the bottom of latch housying,r 47 and serves as a stopr to always keep tlmmb--turn`s 54j vertical; spring 56 on bolt operating lmember 53 always urging said` member back into the position shown in the drawings after the thumb `turns 54have been The bolt operating'l mi"e"mber 53 is provided V with an armY 57 that islarranged to engage vvitha lug 58oi'1 deadbolt 50 to move said dead bolt into a locked position.

llVhen' the dead bolt 5() is moved outwardly into the lockedl position -afc'atch member 60 on ai dead bolt locking dog'-61 drops into a notch 62 in the bottom 'edge of the dead bolt andv locks the same in' oiitiiiardly projected positionr so Athat'it can not be retracted eX- cept turning one of the knobs and retracting the latch bolt. The'dead'b'olt locking dog G1 is'c'onn'ected vto the housing 47 `by .Pivot 63, is vurged UPWU'CHY by Spring 64 and is proyidedf-with a cam point 65 that is jai-ranged to be engaged bya lug' GG 'on the bottom'side ot' sti'rrup member 20 to depress member 61 from thenotch' G2 in dead bolt 5()l at" the first rearward movement 'of latch bolt the locking,` dog and withdraw the catch v17 thus allowing' the dejad bolt 50 to be niov'ed rearwardly or retracted by 'retraction oi the rlatch'bolt 17 the liig on'tlie stiiup E20 striking a shoulder 67 on dead bolt 50 as it moves rearwardly. The arrangement inst described provides means for lee mg; the dead bolt 50 so that it cannot benioved reiniiardl'y by anyY `Vinstru ment that might be inserted between the door and the ja'mb in an attempt to Vpiek the llock and yet will ube automatically retracted by turningfa knob and retracting the' nien-boit..

,T0-'prevent che daneben 5o 'anni being throwninto locked -po'sition' except -when the knobxiekfmeehanisn is rocked' we provide on the bolt operating member 53 a pawl G3 arranged to be pivoted on a lug 7() and to be moved outwardly by a springr 71 into the notch 46 when the pawl 45 is withdrawn from said notch into the unlocked position.

In the operation of this lock when the knob lock mechanism is in unlocked position either knob may be freely turned to operate the latch bolt 17 in the usual manner, the pawl 45 beingl vclear of Jdie notch 4G and thc dead bolt locking pawl G8 being within such notch thus preventing" the dead bolt 50 'from being thrown into locked position. llhen the locking` spindle 2S is moved outwardlyv by depressing' push button 32, the locking"v member 43 will be turned and puwl 45 will be caused to enter slot 4G thus locking.r the outer knob 11 against turning' and at the same time moving the pawl G8 ont ot such notch so that the dead bolt may bc thrown by either thumb turn lllhen the dead bolt 50 is thrown into lockingl position it will be caught andA held by the dos` G0 and cannot be rctractcd by the thumb turn or in any other way except by turning* the knob -from the inside or unlocking` the lock and turning the knob from the outside.

The inner knob 10 may always be turned regardless ot' whether the knob loch; mochanism is in a locked or an unlocked position. The outer knob is free to turn when in an unlocked position but cannot be turned ci:n cept by the use of a key when locked and when it is so turned by the use ot a key will again resume its locked position :is soon as the key is withdrawn. The dead bolt 50 is always retracted by the retraction ot the latch bolt 17 but may be locked by the thumb turn 54 on either side of the door when the knob lock mechanism is in locked position.

The foregoing description and accompanying drawings clearly disclose a preferred embodiment ot our invention but it will be understood that this disclosure is merely illustrative and that changes in the invention may be made within the scopo and spirit o! the following claims.

le claim:

1. The combination with a lock having- :i latch bolt, of a dead bolt@ means ior locking;l said dead bolt in outwardly projected posi tion and means 'for autonmtically nnlocl-:izu: and r'etractimr said dead bolt when said latch bolt isrctracted.

i2. The combination with a lock haring: a latch bolt. ot a dead bolt, a catch member for locking said dead bolt in outwardly projected position and means connected with said latch bolt for disengaging' said catch member andrretrai'rting said dead bolt when said latch bolt is retracted.

3.'The combination with a lock having a vlatch bolt, of means for retracting said latch bolt,A l'devices for locking said retractm means, a dead bolt and means for automatilill l :lli 

